Articles | Volume 12, issue 11
https://doi.org/10.5194/amt-12-5829-2019
https://doi.org/10.5194/amt-12-5829-2019
Research article
 | 
07 Nov 2019
Research article |  | 07 Nov 2019

Performance of a new coaxial ion–molecule reaction region for low-pressure chemical ionization mass spectrometry with reduced instrument wall interactions

Brett B. Palm, Xiaoxi Liu, Jose L. Jimenez, and Joel A. Thornton

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Latest update: 13 Apr 2024
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Short summary
We introduce a coaxial, low-pressure ion–molecule reaction (IMR) region for iodide-adduct chemical ionization mass spectrometry, designed to decrease the effects of IMR wall interactions with organic/inorganic gases. This IMR has 3–10 times shorter delay times than previous IMRs. We introduce a conceptual framework for understanding and subtracting the background signal due to analyte molecules interacting with IMR walls. This framework can be applied to other tubing and instrument systems.